Improved boring and grinding apparatus



lUNiTEn STATES PATENT SAMUEL CARY, OF CENTREVILLE, LOUISIANA. n

Specification forming part of Letters Patent No. 56,705, dated July 31, 1866...

To all whom it may concern: l

Be it known that I, SAMUEL CARY, of Centreville, in the parish of St. Marys, State of Louisiana, have invented a certain new and useful Machine or Mill for Boring and Grinding Salt from thel Mine or Rock 5 and I hereby declare that the following is afull, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a side elevation of the machine or mill in a vertical position. Fig. 2 shows an under or working side'view of the boring and grinding apparatus.

rlhe object of my invention isv to produce salt direct from the mine or rock, ground or pulverized, or in all the various grades and sizes required for the purpose of trade and commerce.

My invention consists in the construction of the drilling, boring, and grinding apparatus, in combination with the screw-feed mechanism and driving machinery, as will be hereinafter more fully described.

To enable others skilled in the art to make and use my invention, I will describe it more fully, referring to the drawings and to the letters of reference marked thereon.

The frame for supporting the working parts of my machine or mill I make out of square- Sawed timber of any desired size to secure suitable strength to the structure. To the sills A, I frame posts B B, of any desired height, about the center of which I frame crosstimbers C C, and on the tcp similar cross'timbers D I). These are connected together by a broad timber, G, in the center, through which the drillshaft E and the feed screw F have their boxes j' and g, to support the drill-shaft for operating the boring and grinding mechanism.

In the top portion of the long drill-shaft E there is a long slot, c, into which is iitted a feather in the center hole of the bevel-gear wheel H, to allow the drillshaft to be fed or moved up or down while the mill is being driven by the pinion I on the horizontal shaft J, by means of a belt 'from the driving-power on the pulleys K K.

The machine or mill may be operated in any position-either perpendicular, horizontal, or at any angle desired.

The feed-screw F, I make out of a tube or hollow shaft, it being iitted into the box g on the broad supporting-timber G. On one end of the feed-screw there may be placed a handwheel, L, to feed the boring and grinding apparatus to the rock', or there may be a series of gear or band wheels, so arranged and con collars d d and set-screws, which are placed on the drill-shaft at each end of the screw.

On the lower end of the drill-shaft is secured theboring and grinding mechanism, which consists of a strong vfour-armed flange, M, which should be cast of brass or other metal not liable to rust or corrode by the action of the salt, the faces of the arms m m m m being inclined at an angle of about twenty-two degrees, on which are placed, and secured with set-screws 0 o, plates of tempered steel, they having notched or saw-teeth edges unan on both the outer ends and under side, where they are to be brought in contact with the rock or mass of salt to be extricated and ground or prepared for transportation and use. i

The drill-shaft E is provided with a socket in the lower end, into which is tted a drillpoint, N, with reversed notched or toothed edges, this drill-point N forming the pivot or center for the boring and grinding mill as it works its way into the mass of rock-salt.

The arms of the mill may be any desired length from one to three feet, so as to bore and grind out a hole from two to six feet in diameter, according to the power employed for the purpose. The mill will operateequally well in any position it may be placed.

When excavations have been made perpendicularly of sufcient size to admit the mill and other necessary fixtures into the cavity, it may be turned down so as to work and bore horizontally, and tunnel out under, and thereby save the labor and expense of remov-A ing the earth above the mine or lead of salt, the best of which is often found many feet beneath the surface.

Elevators may be arranged to take the ground salt, as it is being produced by the process of mining, and deliver it automatically in sacks on the surface, by the power of the sacks separately in all of the various grades,

from the coarse alum to the finest-ground table salt.

Having thus fully described my invention7 what I claim as new, and desire to secure by Letters Patent, is-

1. The application and use of tempered steel notched or toothed plates secured so as to be adjustable to the arms of a metal flange, to form a boring and grinding mill, for the purposes herein set forth.

2. The drilling, boring, and grinding apparatus, in combination with the screw-feed mechanism and driving machinery, as and for the purposes specified.

SAMUEL GARY.

Witnesses:

J. B. WOODRUFF, EDM. F. BROWN.

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